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MBruns for President
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First post in this section - new to me S2 - Cranks won't start
I have a bunch of experience on the 911 end.
Picked up a S2 to have some fun with. Had a friend look at the car in KC - checked out for the most part. Had it delivered - guy started it right up - backed it off the transport - put it in the driveway. We admired for a little bit - went to put in the garage - and it wouldn't start. ![]() Cranked over - Tach not jumping - no power to 86 on the DME Relay. tried a spare (luckily uses the same as the 964 engine in my 1974) Under the dash - looks like a speaker for an aftermarket alarm? ![]() Tried to by pass the alarm - and heated up some wires - poking around the fuse box and it looks like it has a few hacks to bypass maybe a brake light. ![]() ![]() So what I've done - - Charged the battery to 100% - Changed out the DME Relay - Tested to see if there was voltage at 86 with the key on at the dme relay (there was not) - bypassed the factory alarm - lead 1 got hot - removed distributer cap - checked and cleaned all contacts. - removed coil and cleaned and checked all contacts - tried installing the fuse at (12) for the factory alarm - alarm went off - even with key in the ignition. Definitely seems like an immobilizer - some sort of block - car turns over - and again - it ran well when they backed it off the trailer - but now where to go from here?
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Current Whip: - 2003 996 Twin Turbo - 39K miles - Lapis Blue/Grey Past: 1974 IROC (3.6) , 1987 Cabriolet (3.4) , 1990 C2 Targa, 1989 S2 |
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Registered
Join Date: Jul 2004
Location: Upstate New York
Posts: 3,265
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When you say "alarm went off", was it the questionable speaker or the horn near the battery that went off?
To eliminate the DME relay as a possible cause, use a two wire jumper (with three male spade connectors) to the three large female contacts in the fuse block. If the tach still does not bounce, then check for a bad connection at the flywheel sensor (your 944S2 has only one sensor).
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Good luck, George Beuselinck |
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MBruns for President
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Horn near the battery
So if I do the three spade connector to the fuse box and the tach does not bounce -- then my next step is to check the flywheel sensor (or bosch reference sensor)
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Current Whip: - 2003 996 Twin Turbo - 39K miles - Lapis Blue/Grey Past: 1974 IROC (3.6) , 1987 Cabriolet (3.4) , 1990 C2 Targa, 1989 S2 |
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Registered
Join Date: May 2003
Location: Stumptown
Posts: 502
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Try the dme jumper and see what happens. When my factory alarm failed, I had very similar issues.
Fyi, the tach on my S2 does't bounce when it is starting. I would yard out that aftermarket alarm, who knows what gremlins lurk there. Maybe a kill switch that got bumped? |
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MBruns for President
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So for the 1989 S2 - or at least in my case - do not follow Clark's Garage's Alarm System - Bypassing
You will melt the wires! use this (seems this works for the cars with the 928 Alarm relay) Here's how to wire past the OEM Alarm on a 1989 951 - Rennlist Discussion Forums (I did get this to work and got the car started)
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Current Whip: - 2003 996 Twin Turbo - 39K miles - Lapis Blue/Grey Past: 1974 IROC (3.6) , 1987 Cabriolet (3.4) , 1990 C2 Targa, 1989 S2 |
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